Show node attribute in node-status

[achanda]

Adds node attributes to the node-status command when a single
node ID is passed

Closes #303

[achanda]

Currently this looks like this:

Abhishek@dev:~/gosrc/bin$ nomad node-status 2649b1ef-de9a-1427-9a19-42b899725ece
ID         = 2649b1ef-de9a-1427-9a19-42b899725ece
Name       = dev
Class      = <none>
Datacenter = dc1
Drain      = false
Status     = ready
Attributes = cpu.numcores:128, cpu.frequency:2600.000000, driver.docker.version:1.8.3, hostname:dev, platform.gce.machine-type:n1-standard-16, storage.bytestotal:105654812672, driver.docker:1, driver.exec:1, driver.rkt.version:rkt version 0.9.0, memory.totalbytes:63332859904, platform.gce.scheduling.on-host-maintenance:MIGRATE, storage.bytesfree:91570016256, driver.java.runtime:OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1), os.version:14.04, platform.gce.cpu-platform:Intel Sandy Bridge, platform.gce.network.default:true, platform.gce.tag.https-server:true, driver.java:1, driver.java.vm:OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode), driver.rkt:1, platform.gce.network.default.ip:10.240.209.200, platform.gce.scheduling.automatic-restart:TRUE, os.name:ubuntu, platform.gce.hostname:dev.c.cloudblocks.cloudscaling.com.internal, platform.gce.network.default.external-ip.0:104.197.131.232, cpu.totalcompute:332800.000000, driver.java.version:1.7.0_79, driver.rkt.appc.version:0.9., kernel.version:3.19.0-30-generic, network.ip-address:10.240.209.200, storage.volume:/dev/sda1, arch:amd64, cpu.modelname:Intel(R) Xeon(R) CPU @ 2.60GHz, kernel.name:linux, platform.gce.id:13085678475098123138, platform.gce.zone:us-central1-a, platform.gce.tag.http-server:true

### Allocations
ID  EvalID  JobID  TaskGroup  DesiredStatus  ClientStatus

Trying to see how to make this equally human and machine readable. Open to feedback.

[jippi]

indent is off by one

[achanda]

That's because of the + sign. If you click on 'View', you will see that it lines up.

[cbednarski]

I think this is because that line uses spaces instead of tabs. gofmt should fix it. @achanda Not sure which editor you use but I have mine set to run gofmt when I save a file -- helps with things like this.

[dadgar]

I would sort the keys and then create the attributes by iterating through the sorted keys and making the list. That way looking for a particular attribute in the output will be a lot easier!

[achanda]

Example looks like

Abhishek@dev:~/gosrc/bin$ nomad node-status cb31a305-3d23-b1ea-a06c-eb9adb37965b
ID         = cb31a305-3d23-b1ea-a06c-eb9adb37965b
Name       = dev
Class      = <none>
Datacenter = dc1
Drain      = false
Status     = ready
Attributes = arch:amd64, cpu.frequency:2600.000000, cpu.modelname:Intel(R) Xeon(R) CPU @ 2.60GHz, cpu.numcores:128, cpu.totalcompute:332800.000000, driver.docker:1, driver.docker.version:1.8.3, driver.exec:1, driver.java:1, driver.java.runtime:OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1), driver.java.version:1.7.0_79, driver.java.vm:OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode), driver.rkt:1, driver.rkt.appc.version:0.9., driver.rkt.version:rkt version 0.9.0, hostname:dev, kernel.name:linux, kernel.version:3.19.0-30-generic, memory.totalbytes:63332859904, network.ip-address:10.240.209.200, os.name:ubuntu, os.version:14.04, platform.gce.cpu-platform:Intel Sandy Bridge, platform.gce.hostname:dev.c.cloudblocks.cloudscaling.com.internal, platform.gce.id:13085678475098123138, platform.gce.machine-type:n1-standard-16, platform.gce.network.default:true, platform.gce.network.default.external-ip.0:104.197.131.232, platform.gce.network.default.ip:10.240.209.200, platform.gce.scheduling.automatic-restart:TRUE, platform.gce.scheduling.on-host-maintenance:MIGRATE, platform.gce.tag.http-server:true, platform.gce.tag.https-server:true, platform.gce.zone:us-central1-a, storage.bytesfree:91253256192, storage.bytestotal:105654812672, storage.volume:/dev/sda1

### Allocations
ID  EvalID  JobID  TaskGroup  DesiredStatus  ClientStatus

[dadgar]

Awesome! Thanks @achanda

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